My. T.C.'s Year

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Every car forum needs to have a lengthy topic, which goes on forever, and often strays off topic.
Can we trust the onboard oil change light? Is the algorithm sophisticated enough to truly know if I'm a regular driver, or if I am a severe duty driver?
Who does their own oil change? What do you use? Who is allowing the dealer to do it? Anyone going to a "lube shop" like Oil Can Henry's, Jiffy Lube, Pep Boys, Oil Changers?
Who is using only Motorcraft? Anyone like "boutique oil", K&N filters, and fancy magnets?
Let's hear it all.